As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON APPROACH, THE CREW FELT A VIBRATION ON THE NR1 ENGINE AND SHUT IT DOWN AS A PRECAUTIONARY MEASURE. MAINT INSPECTED THE AC AND FOUND THE NR 1 PROP LEAKING BETWEEN THE HUB AND REGULATOR. THE PROP WAS REMOVED AND REPLACED WITH A SERVICEABLE PROP, RIG CHECKS COMPLETED, THE ENGINE RAN AND THE AC WAS RETURNED TO SERVICE.